64209639312 has 120 divisors (see below), whose sum is σ = 221166580544. Its totient is φ = 16934406912.

The previous prime is 64209639311. The next prime is 64209639313. The reversal of 64209639312 is 21393690246.

64209639312 is a `hidden beast` number, since 6 + 4 + 2 + 0 + 9 + 639 + 3 + 1 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (64209639311) and next prime (64209639313).

It is not an unprimeable number, because it can be changed into a prime (64209639311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2436898 + ... + 2463105.

Almost surely, 2^64209639312 is an apocalyptic number.

It is an amenable number.

64209639312 is an abundant number, since it is smaller than the sum of its proper divisors (156956941232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64209639312 is a wasteful number, since it uses less digits than its factorization.

64209639312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4900037 (or 4900028 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The spelling of 64209639312 in words is "sixty-four billion, two hundred nine million, six hundred thirty-nine thousand, three hundred twelve".